<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>WebGL</title>
</head>
<body onload="main()">
    <canvas id="canvas_id" width="400" height="400" style="color: aquamarine;">TIP</canvas>
    <script src="DrawRectangle.js"></script>
</body>
</html>